Provided by: x264_0.142.2389+git956c8d8-2_i386 bug


       x264 - fast h264 encoder


       x264 core:133 r2339 585324f Syntax: x264 [options] -o outfile infile

       Infile can be raw (in which case resolution is required),

              or YUV4MPEG (*.y4m), or Avisynth if compiled with support (yes).
              or libav* formats if compiled with lavf support  (yes)  or  ffms
              support (yes).

   Outfile type is selected by filename:
              .264 -> Raw bytestream .mkv -> Matroska .flv -> Flash Video .mp4
              -> MP4 if compiled with GPAC support (yes)

       Output bit depth: 10 (configured at compile time)


       -h, --help
              List basic options

              List more options

              List all options

       Example usage:

              Constant quality mode:

              x264 --crf 24 -o <output> <input>

              Two-pass with a bitrate of 1000kbps:

              x264 --pass 1 --bitrate 1000 -o <output> <input> x264  --pass  2
              --bitrate 1000 -o <output> <input>


              x264 --qp 0 -o <output> <input>

              Maximum PSNR at the cost of speed and visual quality:

              x264 --preset placebo --tune psnr -o <output> <input>

              Constant bitrate at 1000kbps with a 2 second-buffer:

              x264 --vbv-bufsize 2000 --bitrate 1000 -o <output> <input>


       --profile <string>
              Force  the limits of an H.264 profile Overrides all settings.  -

              --no-8x8dct --bframes 0 --no-cabac --cqm  flat  --weightp  0  No
              interlaced.  No lossless.

              - main:

              --no-8x8dct --cqm flat No lossless.

              - high:

              No lossless.

              - high10:

              No lossless.  Support for bit depth 8-10.

              - high422:

              No   lossless.    Support  for  bit  depth  8-10.   Support  for
              4:2:0/4:2:2 chroma subsampling.

              - high444:

              Support for  bit  depth  8-10.   Support  for  4:2:0/4:2:2/4:4:4
              chroma subsampling.

       --preset <string>
              Use  a preset to select encoding settings [medium] Overridden by
              user settings.  - ultrafast:

              --no-8x8dct --aq-mode  0  --b-adapt  0  --bframes  0  --no-cabac
              --no-deblock  --no-mbtree  --me dia --no-mixed-refs --partitions
              none --rc-lookahead 0 --ref 1 --scenecut 0 --subme 0 --trellis 0
              --no-weightb --weightp 0

              - superfast:

              --no-mbtree  --me  dia  --no-mixed-refs  --partitions  i8x8,i4x4
              --rc-lookahead 0 --ref 1 --subme 1 --trellis 0 --weightp 1

              - veryfast:

              --no-mixed-refs --rc-lookahead 10 --ref 1 --subme 2 --trellis  0
              --weightp 1

              - faster:

              --no-mixed-refs --rc-lookahead 20 --ref 2 --subme 4 --weightp 1

              - fast:

              --rc-lookahead 30 --ref 2 --subme 6 --weightp 1

              - medium:

              Default settings apply.

              - slow:

              --b-adapt  2  --direct  auto  --me umh --rc-lookahead 50 --ref 5
              --subme 8

              - slower:

              --b-adapt  2   --direct   auto   --me   umh   --partitions   all
              --rc-lookahead 60 --ref 8 --subme 9 --trellis 2

              - veryslow:

              --b-adapt  2  --bframes  8  --direct  auto --me umh --merange 24
              --partitions all --ref 16 --subme 10 --trellis 2  --rc-lookahead

              - placebo:

              --bframes   16   --b-adapt   2  --direct  auto  --slow-firstpass
              --no-fast-pskip  --me  tesa  --merange   24   --partitions   all
              --rc-lookahead 60 --ref 16 --subme 11 --trellis 2

       --tune <string>
              Tune the settings for a particular type of source or situation

              Overridden  by user settings.  Multiple tunings are separated by
              commas.  Only one psy tuning can be used at a time.  - film (psy

              --deblock -1:-1 --psy-rd <unset>:0.15

              - animation (psy tuning):

              --bframes  {+2} --deblock 1:1 --psy-rd 0.4:<unset> --aq-strength
              0.6 --ref {Double if >1 else 1}

              - grain (psy tuning):

              --aq-strength   0.5   --no-dct-decimate    --deadzone-inter    6
              --deadzone-intra  6  --deblock -2:-2 --ipratio 1.1 --pbratio 1.1
              --psy-rd <unset>:0.25 --qcomp 0.8

              - stillimage (psy tuning):

              --aq-strength 1.2 --deblock -3:-3 --psy-rd 2.0:0.7

              - psnr (psy tuning):

              --aq-mode 0 --no-psy

              - ssim (psy tuning):

              --aq-mode 2 --no-psy

              - fastdecode:

              --no-cabac --no-deblock --no-weightb --weightp 0

              - zerolatency:

              --bframes   0   --force-cfr   --no-mbtree   --sync-lookahead   0
              --sliced-threads --rc-lookahead 0

              Don't  force  these  faster  settings with --pass 1: --no-8x8dct
              --me dia --partitions  none  --ref  1  --subme  {2  if  >2  else
              unchanged} --trellis 0 --fast-pskip

       Frame-type options:

       -I, --keyint <integer or "infinite"> Maximum GOP size [250]

       -i, --min-keyint <integer>
              Minimum GOP size [auto]

              Disable adaptive I-frame decision

       --scenecut <integer>
              How aggressively to insert extra I-frames [40]

              Use Periodic Intra Refresh instead of IDR frames

       -b, --bframes <integer>
              Number of B-frames between I and P [3]

       --b-adapt <integer>
              Adaptive  B-frame  decision  method  [1] Higher values may lower
              threading efficiency.  - 0: Disabled -  1:  Fast  -  2:  Optimal
              (slow with high --bframes)

       --b-bias <integer>
              Influences how often B-frames are used [0]

       --b-pyramid <string>
              Keep  some  B-frames  as  references [normal] - none: Disabled -
              strict: Strictly hierarchical pyramid - normal: Non-strict  (not
              Blu-ray compatible)

              Use recovery points to close GOPs Only available with b-frames

              Disable CABAC

       -r, --ref <integer>
              Number of reference frames [3]

              Disable loop filter

       -f, --deblock <alpha:beta>
              Loop filter parameters [0:0]

       --slices <integer>
              Number  of  slices  per  frame; forces rectangular slices and is
              overridden by other slicing options

       --slices-max <integer>
              Absolute     maximum     slices     per     frame;     overrides
              slice-max-size/slice-max-mbs when necessary

       --slice-max-size <integer> Limit the size of each slice in bytes

       --slice-max-mbs  <integer>  Limit the size of each slice in macroblocks

       --slice-min-mbs <integer> Limit the size of each slice  in  macroblocks

       --tff  Enable interlaced mode (top field first)

       --bff  Enable interlaced mode (bottom field first)

              Enable constrained intra prediction.

       --pulldown <string>
              Use  soft  pulldown  to  change  frame  rate - none, 22, 32, 64,
              double, triple, euro (requires cfr input)

              Flag stream as interlaced  but  encode  progressive.   Makes  it
              possible  to  encode  25p  and  30p  Blu-Ray streams. Ignored in
              interlaced mode.

       --frame-packing  <integer>  For  stereoscopic   videos   define   frame
              -  0:  checkerboard - pixels are alternatively from L and R - 1:
              column alternation - L and R are interlaced by column -  2:  row
              alternation  - L and R are interlaced by row - 3: side by side -
              L is on the left, R on the right - 4: top bottom - L is on  top,
              R on bottom - 5: frame alternation - one view per frame


       -q, --qp <integer>
              Force constant QP (0-69, 0=lossless)

       -B, --bitrate <integer>
              Set bitrate (kbit/s)

       --crf <float>
              Quality-based VBR (0-51) [23.0]

       --rc-lookahead <integer> Number of frames for frametype lookahead [40]

       --vbv-maxrate <integer> Max local bitrate (kbit/s) [0]

       --vbv-bufsize <integer> Set size of the VBV buffer (kbit) [0]

       --vbv-init <float>
              Initial VBV buffer occupancy [0.9]

       --crf-max <float>
              With CRF+VBV, limit RF to this value May cause VBV underflows!

       --qpmin <integer>
              Set min QP [0]

       --qpmax <integer>
              Set max QP [81]

       --qpstep <integer>
              Set max QP step [4]

       --ratetol <float>
              Tolerance of ABR ratecontrol and VBV [1.0]

       --ipratio <float>
              QP factor between I and P [1.40]

       --pbratio <float>
              QP factor between P and B [1.30]

       --chroma-qp-offset <integer>
              QP difference between chroma and luma [0]

       --aq-mode <integer>
              AQ method [1] - 0: Disabled - 1: Variance AQ (complexity mask) -
              2: Auto-variance AQ (experimental)

       --aq-strength <float>
              Reduces blocking and blurring in flat and textured areas. [1.0]

       -p, --pass <integer>
              Enable multipass ratecontrol - 1: First pass, creates stats file
              -  2:  Last  pass,  does not overwrite stats file - 3: Nth pass,
              overwrites stats file

       --stats <string>
              Filename for 2 pass stats ["x264_2pass.log"]

              Disable mb-tree ratecontrol.

       --qcomp <float>
              QP curve compression [0.60]

       --cplxblur <float>
              Reduce fluctuations in QP (before curve compression) [20.0]

       --qblur <float>
              Reduce fluctuations in QP (after curve compression) [0.5]

       --zones <zone0>/<zone1>/...
              Tweak the bitrate of regions of the video Each zone  is  of  the

              <start frame>,<end frame>,<option> where <option> is either

              q=<integer> (force QP)

       or     b=<float> (bitrate multiplier)

       --qpfile <string>
              Force  frametypes  and QPs for some or all frames Format of each
              line: framenumber frametype QP QP is optional  (none  lets  x264
              choose). Frametypes: I,i,K,P,B,b.

              K=<I or i> depending on open-gop setting

              QPs are restricted by qpmin/qpmax.


       -A, --partitions <string>
              Partitions  to  consider  ["p8x8,b8x8,i8x8,i4x4"]  - p8x8, p4x4,
              b8x8, i8x8, i4x4 - none, all (p4x4 requires p8x8. i8x8  requires

       --direct <string>
              Direct MV prediction mode ["spatial"] - none, spatial, temporal,

              Disable weighted prediction for B-frames

       --weightp <integer>
              Weighted prediction for P-frames [2] - 0: Disabled - 1: Weighted
              refs - 2: Weighted refs + Duplicates

       --me <string>
              Integer  pixel  motion  estimation method ["hex"] - dia: diamond
              search, radius 1 (fast) - hex: hexagonal search, radius 2 - umh:
              uneven  multi-hexagon  search  -  esa: exhaustive search - tesa:
              hadamard exhaustive search (slow)

       --merange <integer>
              Maximum motion vector search range [16]

       --mvrange <integer>
              Maximum motion vector length [-1 (auto)]

       --mvrange-thread <int>
              Minimum buffer between threads [-1 (auto)]

       -m, --subme <integer>
              Subpixel motion estimation and mode decision [7]  -  0:  fullpel
              only  (not  recommended)  -  1:  SAD  mode  decision,  one  qpel
              iteration - 2: SATD mode decision - 3-5: Progressively more qpel
              -  6:  RD mode decision for I/P-frames - 7: RD mode decision for
              all frames - 8: RD refinement for I/P-frames - 9: RD  refinement
              for all frames - 10: QP-RD - requires trellis=2, aq-mode>0 - 11:
              Full RD: disable all early terminations

       --psy-rd <float:float>
              Strength  of  psychovisual  optimization  ["1.0:0.0"]   #1:   RD
              (requires subme>=6) #2: Trellis (requires trellis, experimental)

              Disable all visual optimizations that worsen both PSNR and SSIM.

              Don't decide references on a per partition basis

              Ignore chroma in motion estimation

              Disable adaptive spatial transform size

       -t, --trellis <integer>
              Trellis  RD quantization. [1] - 0: disabled - 1: enabled only on
              the final encode of a MB - 2: enabled on all mode decisions

              Disables early SKIP detection on P-frames

              Disables coefficient thresholding on P-frames

       --nr <integer>
              Noise reduction [0]

       --deadzone-inter <int>
              Set the size of the inter luma quantization deadzone [21]

       --deadzone-intra <int>
              Set the size  of  the  intra  luma  quantization  deadzone  [11]
              Deadzones should be in the range 0 - 32.

       --cqm <string>
              Preset quant matrices ["flat"] - jvt, flat

       --cqmfile <string>
              Read  custom  quant matrices from a JM-compatible file Overrides
              any other --cqm* options.

       --cqm4 <list>
              Set all 4x4 quant matrices Takes a comma-separated  list  of  16

       --cqm8 <list>
              Set  all  8x8  quant matrices Takes a comma-separated list of 64

       --cqm4i, --cqm4p, --cqm8i, --cqm8p <list>
              Set both luma and chroma quant matrices

       --cqm4iy, --cqm4ic, --cqm4py, --cqm4pc <list>
              Set individual quant matrices

       Video Usability Info (Annex E): The VUI settings are not  used  by  the
       encoder  but  are  merely  suggestions  to  the playback equipment. See
       doc/vui.txt for details. Use at your own risk.

       --overscan <string>
              Specify crop overscan setting ["undef"] - undef, show, crop

       --videoformat <string>
              Specify video format ["undef"] - component,  pal,  ntsc,  secam,
              mac, undef

       --range <string>
              Specify color range ["auto"] - auto, tv, pc

       --colorprim <string>
              Specify  color  primaries  ["undef"]  -  undef,  bt709,  bt470m,

              smpte170m, smpte240m, film

       --transfer <string>
              Specify  transfer  characteristics  ["undef"]  -  undef,  bt709,
              bt470m, bt470bg, linear,

              log100, log316, smpte170m, smpte240m

       --colormatrix <string>
              Specify  color  matrix  setting  ["???"]   -  undef, bt709, fcc,

              smpte170m, smpte240m, GBR, YCgCo

       --chromaloc <integer>
              Specify chroma sample location (0 to 5) [0]

       --nal-hrd <string>
              Signal HRD information (requires vbv-bufsize) - none,  vbr,  cbr
              (cbr not allowed in .mp4)

              Force pic_struct in Picture Timing SEI

       --crop-rect <string>
              Add  'left,top,right,bottom'  to  the  bitstream-level  cropping


       -o, --output <string>
              Specify output file

       --muxer <string>
              Specify output container format ["auto"] - auto, raw, mkv,  flv,

       --demuxer <string>
              Specify  input  container format ["auto"] - auto, raw, y4m, avs,
              lavf, ffms

       --input-fmt <string>
              Specify input file format (requires lavf support)

       --input-csp <string>
              Specify input colorspace format for raw input - valid  csps  for
              `raw' demuxer:

              i420, yv12, nv12, i422, yv16, nv16, i444, yv24, bgr, bgra, rgb

              - valid csps for `lavf' demuxer:

              yuv420p,  yuyv422,  rgb24,  bgr24,  yuv422p,  yuv444p,  yuv410p,
              yuv411p, gray, monow, monob, pal8, yuvj420p, yuvj422p, yuvj444p,
              xvmcmc,  xvmcidct,  uyvy422,  uyyvyy411,  bgr8, bgr4, bgr4_byte,
              rgb8, rgb4, rgb4_byte,  nv12,  nv21,  argb,  rgba,  abgr,  bgra,
              gray16be,  gray16le,  yuv440p,  yuvj440p,  yuva420p, vdpau_h264,
              vdpau_mpeg1,  vdpau_mpeg2,   vdpau_wmv3,   vdpau_vc1,   rgb48be,
              rgb48le,   rgb565be,  rgb565le,  rgb555be,  rgb555le,  bgr565be,
              bgr565le, bgr555be, bgr555le, vaapi_moco, vaapi_idct, vaapi_vld,
              yuv420p16le, yuv420p16be, yuv422p16le, yuv422p16be, yuv444p16le,
              yuv444p16be,   vdpau_mpeg4,   dxva2_vld,   rgb444le,   rgb444be,
              bgr444le,   bgr444be,   y400a,   bgr48be,  bgr48le,  yuv420p9be,
              yuv420p9le, yuv420p10be, yuv420p10le, yuv422p10be,  yuv422p10le,
              yuv444p9be,  yuv444p9le,  yuv444p10be,  yuv444p10le, yuv422p9be,
              yuv422p9le, vda_vld, gbrp, gbrp9be, gbrp9le, gbrp10be, gbrp10le,
              gbrp16be, gbrp16le

       --output-csp <string>
              Specify output colorspace ["i420"] - i420, i422, i444, rgb

       --input-depth <integer> Specify input bit depth for raw input

       --input-range <string>
              Specify input color range ["auto"] - auto, tv, pc

       --input-res <intxint>
              Specify input resolution (width x height)

       --index <string>
              Filename for input index file

       --sar width:height
              Specify Sample Aspect Ratio

       --fps <float|rational>
              Specify framerate

       --seek <integer>
              First frame to encode

       --frames <integer>
              Maximum number of frames to encode

       --level <string>
              Specify level (as defined by Annex A)

              Enable compatibility hacks for Blu-ray support

       -v, --verbose
              Print stats for each frame

              Don't show the progress indicator while encoding

              Quiet Mode

       --log-level <string>
              Specify  the  maximum  level  of logging ["info"] - none, error,
              warning, info, debug

       --psnr Enable PSNR computation

       --ssim Enable SSIM computation

       --threads <integer>
              Force a specific number of threads

       --lookahead-threads <integer> Force  a  specific  number  of  lookahead

              Low-latency but lower-efficiency threading

              Run Avisynth in its own thread

       --sync-lookahead   <integer>  Number  of  buffer  frames  for  threaded

              Slightly improve quality of SMP, at the cost of repeatability

              Ensure exact reproducibility across different cpus,  as  opposed
              to letting them select different algorithms

       --asm <integer>
              Override CPU detection

              Disable all CPU optimizations

              Enable use of OpenCL

       --opencl-clbin <string> Specify path of compiled OpenCL kernel cache

       --opencl-device <integer>
              Specify OpenCL device ordinal

              Show MB types overlayed on the encoded video

       --dump-yuv <string>
              Save reconstructed frames

       --sps-id <integer>
              Set SPS and PPS id numbers [0]

       --aud  Use access unit delimiters

              Force constant framerate timestamp generation

       --tcfile-in <string>
              Force timestamp generation with timecode file

       --tcfile-out <string>
              Output timecode v2 file from input timestamps

       --timebase <int/int>
              Specify timebase numerator and denominator

              Specify  timebase  numerator  for input timecode file or specify
              timebase denominator for other input

              Eliminate initial delay with container DTS hack


       --vf, --video-filter <filter0>/<filter1>/... Apply video  filtering  to
              the input file

              Filter  options  may  be  specified in <filter>:<option>=<value>

              Available filters: crop:left,top,right,bottom

              removes pixels from the edges of the frame


              resizes frames based on the given criteria: -  resolution  only:
              resizes  and adapts sar to avoid stretching - sar only: sets the
              sar and resizes  to  avoid  stretching  -  resolution  and  sar:
              resizes to given resolution and sets the sar - fittobox: resizes
              the video based on the desired constraints

              - width, height, both

              - fittobox and sar: same as above except with  specified  sar  -
              csp: convert to the given csp. syntax: [name][:depth]

              -  valid csp names [keep current]: i420, yv12, nv12, i422, yv16,
              nv16, i444, yv24, bgr, bgra, rgb - depth: 8 or 16 bits per pixel
              [keep current]

              note:  not  all depths are supported by all csps.  - method: use
              resizer method ["bicubic"]

              - fastbilinear, bilinear, bicubic, experimental, point, -  area,
              bicublin, gauss, sinc, lanczos, spline


              apply  a  selection  pattern to input frames step: the number of
              frames in the pattern offsets:  the  offset  into  the  step  to
              select                a                frame                see:

       (libswscale 2.1.2) (libavformat 55.1.0) (ffmpegsource  built
       on    Jul   26   2013,   gcc:   4.8.1   configuration:   --bit-depth=10
       --chroma-format=all   x264   license:   GPL   version   2   or    later
       libswscale/libavformat/ffmpegsource license: GPL version 2 or later